HD74LS122P Renesas Electronics Corporation., HD74LS122P Datasheet

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HD74LS122P

Manufacturer Part Number
HD74LS122P
Description
Manufacturer
Renesas Electronics Corporation.
Datasheet

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HD74LS122
Retriggerable Monostable Multivibrator (with Clear)
This d-c triggered multivibrator features output pulse width control by three method. The basic pulse time is
programmed by selection of external resistance and capacitance values. The HD74LS122 has internal timing resistor
that allows the circuit to be used with only an external capacitor, if so desired. Once triggered, the basic pulse width
may be extended by retriggering the gated low-level -active (A) or high-level active (B) inputs or be reduced by use of
the overriding clear. Figure 1 illustrates pulse control by retriggering and early clear. This device is provided enough
Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.1 mV/ns.
Rev.2.00, Feb.18.2005, page 1 of 7
Clear
Q
Q
B
B
A = "L"
Clear = "H"
A = "L"
Figure 1
"H"
Typical Input / Output Pulse
t
Output without
clear
w
Retrigger Pulse
t
w
"L"
+ t
Output without
retrigger
PLH
"H"
"H"
REJ03D0428–0200
"H"
"H"
"L"
"L"
"L"
"L"
Feb.18.2005
Rev.2.00

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HD74LS122P Summary of contents

Page 1

HD74LS122 Retriggerable Monostable Multivibrator (with Clear) This d-c triggered multivibrator features output pulse width control by three method. The basic pulse time is programmed by selection of external resistance and capacitance values. The HD74LS122 has internal timing resistor that allows ...

Page 2

... HD74LS122 Features Ordering Information Part Name Package Type HD74LS122P DILP-14 pin HD74LS122FPEL SOP-14 pin (JEITA) Note: Please consult the sales office for the above package availability. Pin Arrangement CLR Q GND Function Table Clear Notes: H; high level, L; low level, X; irrelevant ; transition from low to high level ...

Page 3

HD74LS122 Block Diagram Clear Absolute Maximum Ratings Item Supply voltage Input voltage Power dissipation Storage temperature Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. Recommended Operating Conditions Item Supply voltage Output current Operating temperature Input ...

Page 4

HD74LS122 Electrical Characteristics Item Symbol V IH Input voltage Output voltage Input current Short-circuit output I OS current Supply current Input clamp voltage V IK ° ...

Page 5

HD74LS122 Typical Application Data for HD74LS122 For pulse widths when C 1000 pF, See Figure 3. ext The output pulse is primarily a function of the external capacitor and resistor. For C width ( defined as ...

Page 6

HD74LS122 Testing Method Test Circuit A Input 1 P. 50Ω out B Input 1 P. 50Ω out CLR Input P. 50Ω out Notes includes probe and jig capacitance All diodes ...

Page 7

HD74LS122 Package Dimensions JEITA Package Code RENESAS Code P-DIP14-6.3x19.2-2.54 PRDP0014AB JEITA Package Code RENESAS Code P-SOP14-5.5x10.06-1.27 PRSP0014DF Index mark Rev.2.00, Feb.18.2005, page 7 of ...

Page 8

Keep safety first in your circuit designs! 1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead ...

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